This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 4 |
| 3 | 8 |
| 4 | 15 |
| 5 | 28 |
| 6 | 54 |
| 7 | 101 |
| 8 | 199 |
| 9 | 373 |
| 10 | 743 |
| 11 | 1404 |
| 12 | 2801 |
| 13 | 5353 |
| 14 | 10636 |
| 15 | 20495 |
| 16 | 40615 |
| 17 | 78753 |
| 18 | 155793 |
| 19 | 303553 |
| 20 | 599801 |
| 21 | 1173183 |
| 22 | 2316317 |
| 23 | 4544731 |
| 24 | 8968421 |
| 25 | 17641499 |
| 26 | 34801731 |
| 27 | 68602923 |
| 28 | 135308317 |
| 29 | 267203186 |
| 30 | 526966454 |
| 31 | 1042217402 |
| 32 | 2055373383 |
| 33 | 4070330014 |
| 34 | 8027429651 |
| 35 | 15914813448 |
| 36 | 31389204737 |
| 37 | 62291326036 |
| 38 | 122871494899 |